Burner arm for a barbecue unit



FIG. 1 is a top plan view of a burner arm for a barbeque unit showing my new design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a top perspective view thereof; and

FIG. 4 is a side elevational view thereof. 

The ornamental design for a burner arm for a barbecue unit, as shown and described. 